Font Awesome - Font Awesome makes it easy to add vector icons and social logos to your website. And version 5 is redesigned and built from the ground up!
Befonts - You can download the best fonts, free fonts for personal or commercial use.
The Noun Project - Creating, Sharing and Celebrating the World's Visual Language
Nucleo - Commercial vector icons and accompanying apps to manage and customize them.
font2web - Font2web converts any .ttf (TrueType Font) or .otf (OpenType Font) file to .ttf, .otf, .eot, .
IcoMoon - IcoMoon is an icon management tool that is build to provide iconography.